JG79J821H01 E

NG

LIS

HRequired Tools for Installation

Phillips screwdriverLevelScaleUtility knife or scissors3 in. (75 mm) hole sawTorque wrenchWrench (or spanner)

5/32 in. (4 mm) hexagonal wrenchFlare tool for R410AGauge manifold for R410AVacuum pump for R410ACharge hose for R410APipe cutter with reamer

MSZ-GS30/36NAMSY-GS30/36NA

1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY• Be sure to read these safety precautions and instructions.

• After reading this manual, be sure to store it with the OPERATING INSTRUCTIONS for future reference.• Please report to your supply authority or obtain their consent before connecting this equipment to the power supply system.

■ Do not install the unit by yourself (user).

whom you purchased the unit.■ Follow the instructions detailed in the installation manual.

falling, or leakage of water. ■ When installing the unit, use appropriate protective equipment and tools for

safety. Failure to do so could cause injury.■ Install the unit securely in a place that can bear the weight of the unit. If the installation location cannot bear the weight of the unit, the unit could fall

causing injury.■ Do not alter the unit.

■ Perform electrical work according to the installation manual and be sure to use an exclusive circuit. Do not connect other electrical appliances to the circuit.

■ Ground the unit correctly. Do not connect the ground wire to a gas pipe, water pipe, lightning rod or tele-

phone ground. Defective grounding could cause electric shock.■ Do not damage the wires.

■ Be sure to shut off the main power when setting up the indoor P.C. board or wiring.

Failure to do so could cause electric shock.■

■

If gas leaks and accumulates around the unit, it could cause an explosion.■ Do not use intermediate connection of the power cord or the extension cord.

Do not connect many devices to one AC outlet.

■

an electric shock, the unit falling, etc.■ When plugging the power supply plug into the outlet, make sure that there is

no dust, blockage, or loose parts both in the outlet and on the plug. Verify that the power supply plug is completely in the outlet.

If there is dust, blockage, or loose parts on the power supply plug or the outlet, it could

■ Securely attach the electrical cover to the indoor unit and the service panel to the outdoor unit.

If the electrical cover of the indoor unit and/or the service panel of the outdoor unit are

an electric shock.■ When installing, relocating, or servicing the unit, make sure that no substance

Any presence of foreign substance such as air can cause abnormal pressure rise and

for the system will cause mechanical failure, system malfunction, or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety.

■ Do not discharge the refrigerant into the atmosphere. Check that the refrigerant gas does not leak after installation has been completed. If refrigerant leaks during installation, ventilate the room.

heater, space heater, stove, etc., harmful gases will be generated.■ Use appropriate tools and piping materials for installation. The pressure of R410A is 1.6 times higher than R22. Not using the appropriate

tools and materials, or improper installation could cause the pipes to burst causing an injury.

■ When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.

If the refrigerant pipes are disconnected while the compressor is running and the stop valve is open, air could be drawn in and the pressure in the refrigeration cycle could become abnormally high, causing the pipes to burst.

■ When installing the unit, securely connect the refrigerant pipes before starting the compressor.

If the compressor is started before the refrigerant pipes are connected and the stop valve is open, air could be drawn in and the pressure in the refrigeration cycle could become abnormally high, causing the pipes to burst.

■

■ Install the unit according to national wiring regulations.■ When opening or closing the valve below freezing temperatures, refrigerant may

spurt out from the gap between the valve stem and the valve body, resulting in injuries.

■ Please follow applicable federal, state, or local codes to prevent potential leakage/electric shock. Or install a ground fault interrupt for the prevention of leakage and electric shock.

■ Perform the drainage/piping work securely according to the installation manual. If there is defect in the drainage/piping work, water could drip from the unit, and

damage household items.

■

This could cause injury. ■ Do not install the outdoor unit where small animals may live. If small animals enter the unit and damage its electrical parts, it could cause a

CAUTION (Could lead to serious injury when operated incorrectly.)

WARNING (Could lead to death or serious injury.)

1. BEFORE INSTALLATION

SPLIT-TYPE AIR CONDITIONERSINSTALLATION MANUAL

1-3. SPECIFICATIONS1-3-1. POWER SUPPLY AND INDOOR/OUTDOOR WIRE CONNECTION• Power should be taken from an exclusive branched circuit.• Wiring work should be based on applicable technical standards.• Wiring connections should be made following the diagram.• Securely tighten screws.

Connecting wires and the ground wire• Use solid conductor Min. AWG14 or stranded conductor Min. AWG14.• Use double insulated copper wire with 600 V insulation.• Use copper conductors only.* Follow local electrical codes.Power supply cable and ground wire• Use solid or stranded conductor Min. AWG12.• Use copper conductors only.* Follow local electrical codes.

Note: When the indoor unit is powered from the outdoor unit, depending on local code, a disconnect switch needs to be installed to a power supply circuit.

Pipe lengthUp to 25 ft. (7.5 m) No additional charge is

required.

Exceeding 25 ft. (7.5 m) Additional charge is required.(Refer to the table below.)

• Refrigerant adjustment... If pipe length exceeds 25 ft. (7.5 m), additional refrigerant (R410A) charge is required.

(The outdoor unit is charged with refrigerant for pipe length up to 25 ft. [7.5 m])

Limits

Pipe length 100 ft. (30 m) max.

Height difference 50 ft. (15 m) max.

No. of bends 10 max.

• Remove the valve cover from the outdoor unit, then connect the pipe.• Refrigerant pipes are used to connect the indoor and outdoor units.• Be careful not to crush or over bend the pipe in pipe bending.

1-3-2. REFRIGERANT PIPES• To prevent condensation, insulate the two refrigerant pipes.• Refrigerant pipe bending radius must be 4 in. (100 mm) or more.

CAUTION

tion may cause incorrect installation of the indoor unit, and too little insulation may cause condensate to form.

PipeOutside diameter

Minimum wall thick-

ness

Insulation thickness Insulation material

inch (mm)

For liquid 1/4 (6.35) 0.0315 (0.8) 5/16 (8) Heat resistant foam

gravityFor gas 5/8 (15.88) 0.0394 (1.0) 5/16 (8)

MODEL MSY-GS30NA MSY-GS36NA MSZ-GS30NA MSZ-GS36NA

INDOOR UNIT

Power supply (V, PHASE, Hz) 208/230, 1, 60

Min. Circuit Ampacity (A) 1.0

Fan motor (F.L.A.) (A) 0.76

OUTDOOR UNIT

Power supply (V, PHASE, Hz) 208/230, 1, 60

Max. Fuse size (time delay) (A) 20

Min. Circuit Ampacity (A) 19

Fan motor (F.L.A.) (A) 0.93

Compressor(R.L.A) (A) 13.8

(L.R.A) (A) 17.3

Control voltage Indoor unit - Remote controller: (Wireless)Indoor unit - Outdoor unit: DC12-24 V (Polar)

1-2. SELECTING THE INSTALLATION LOCATION

Refrigerant to be added 1.08 oz. each 5 ft. (20 g/m)

INDOOR UNIT

• Where cool (or warm) air spreads over the entire room.• On a rigid wall to reduce the possibility of vibration.• Where it is not exposed to direct sunlight. Do not expose

to direct sunlight also during the period following unpack-ing to before use.

• Where it can be easily drained.• At a distance 3 ft. (1 m) or more away from a TV and

radio. Operation of the air conditioner may interfere with

the affected device.

incandescent lights. In order to make the infrared remote control operate the air conditioner normally. The heat from the lights may cause deformation or the ultraviolet may cause deterioration.

• • Where it is away from the other heat or steam source.Note: Install the indoor unit high on the wall where air can distribute over the entire room.

REMOTE CONTROLLER • Where it is convenient to operate and easily visible.• Where children cannot easily touch it.

Check that signals from the remote controller from that position are received by the indoor unit (‘beep’ or ‘beep beep’ receiving tone sounds). Then, attach remote controller holder to a pillar or wall and install wireless remote controller.

Note:

the signal from the wireless remote controller may not be received.

OUTDOOR UNIT• Where it is not overly exposed to strong winds.

• Where neighbours are not annoyed by operation sound or hot air.

• Where rigid wall or support is available to prevent the increase of operation sound or vibration.

• Where there is no risk of combustible gas leakage.• If installing the unit in a location high above the ground,

be sure to secure the unit legs.• Where it is at least 10 ft. (3 m) away from the antenna of TV

set or radio. Operation of the air conditioner may interfere with radio or TV reception in areas where reception is

• Install the unit horizontally.• Please install it in an area not affected by snowfall or

blowing snow. In areas with heavy snow, please install

Note:• It is advisable to make a piping loop near outdoor unit

so as to reduce vibration.

location where continuous direct sunlight or excessive water can be avoided as much as possible.

Note:When operating the air conditioner in low outside tem-perature, be sure to follow the instructions described below.• Never install the outdoor unit in a place where its air

inlet/outlet side may be exposed directly to wind.• To prevent exposure to wind, install the outdoor unit

with its air inlet side facing the wall and on the air outlet side.

Avoid the following places for installation where air conditioner trouble is liable to occur.

• Where there is an excessive amount of machine oil in the air.

oily smoke (such as cooking areas and factories, in which the properties of plastic could be changed and damaged).

• Salty places such as the seaside.

• Where there is high-frequency or wireless equipment.• Where there is emission of high levels of VOCs,

including phthalate compounds, formaldehyde, etc., which may cause chemical cracking.

Outdoor unit installation

2-13

/16

in. (

72 m

m)

or m

ore/

5-1

/8 in

. (1

30 m

m) o

r mor

e fo

r le

ft/le

ft re

ar p

ipin

g (u

sing

sp

acer

)

1-4. INSTALLATION DIAGRAM

ACCESSORIESCheck the following parts before installation.<Indoor unit>

(1) Installation plate 1

(2)Attachment screws for the installa-tion plate 4 × 25 mm

7

(3) Remote controller holder 1

(4)Screws for the remote controller holder3.5 × 16 mm (Black)

2

(5) Battery (AAA) for (6) 2

(6) Wireless remote controller 1

(7) Felt tape (For left or left-rear piping) 2

(8) 2

FIELD-SUPPLIED PARTS

(A) Indoor/outdoor unit connecting wire*1 1

(B) Extension pipe 1

(C) Wall hole sleeve 1

(D) Wall hole cover 1

(E) Pipe attachment strap 2 to 5

(F) Screw for (E) 4 × 20 mm 2 to 5

(G) Piping tape 1

(H) Putty 1

(I)

Drain hose (or soft PVC hose, 19/32 in. [15 mm] inner diameter or hard PVC pipe VP16)

1

(J) Refrigerant oil 1

(K) Power supply cord*1 1

Units should be installed by licensed contractor according to local code requirements.

Note:*1 Place indoor/outdoor unit connecting wire

(A) and power supply cord (K) at least 3 ft. (1 m) away from the TV antenna wire.

Unit: inch

Unit: mm

4-11/16 in. (120 mm) or more

Space for indoor unit workingPlease leave the space as shown in the picture for maintenance usage.

After the leak test, apply insulating mate-rial tightly so that there is no gap.

Indoor unit

Wall hole sleeve (C)

Cut off the extra length.Pipe attach-ment strap (E)

Use the wall hole sleeve (C) to prevent indoor/outdoor connecting wire (A) from contacting metal parts in the wall and to protect the wiring from rodents.

Wall hole cover (D)

Seal the wall hole gap with putty (H).

Attach the pipe to wall with pipe at-tachment strap (E).

Attachment screw (F)

33-1/16

13-3

/4~1

4-5/

8

19-11/16

Air inlet

6-7/815

-3/8

13

Air outlet

2-3/8 × 13/16 slot 1-9/16

When the piping is to be attached to a wall comprised of tin plate or metal netting, use chemically treated wooden piece 25/32 in. (20 mm) or thicker between the wall and the piping, or wrap insulation vinyl tape 7 to 8 turns around the piping.To use existing piping, perform COOL operation for 30 minutes and pump down before removing the old air conditioner.

for new refrigerant.

4 in. (100 mm)or more

4 in. (100 mm)

or more

14 in. (350 mm)or more

20 in. (500 mm)*3

or more

Note:Do not obstruct the air outlet.

Indoor unitInstallation

plate

Space

9-27

/32

in. (

250

mm

) or m

ore

4 in. (100 mm) or more

8-11/16 in. (220 mm) or more

clea

r *2

*2 20 in. (500 mm) or more when front and sides of unit are clear

*3 When any 2 sides of left, right and rear of unit are clear

Air inlet

Air

inle

t

Air outlet

402-10 × 21 slot

840

500

390

330

349-

371

175

Drain piping for outdoor unitInstall the unit horizontally.Do not use drain socket in cold regions. Drain may freeze and make the fan stop. The outdoor unit produces condensate during the heating operation. Select the installation place to ensure to prevent the outdoor unit and/or the grounds from being wet by drain water or damaged by frozen drain water.

Note:• The dimensions indicated in the arrows ( ) above

show the required space to guarantee performance of the air conditioner. Install the outdoor unit where the maximum possible space can be provided, con-sidering later relocation, services, or repairs.

power usage may fall about 10% at the place where short cycle is likely occur due to poor ventilation. Installing the air outlet guide (optional) can improve performances.

• If air from the outlet blows against the wall, it may cause stains on the wall.

Do not take in the outlet air discharged by other units directly.

15-3/4 in. or more

(400 mm or more)

39-3/8 in. or more

(1000 mm or more)

3/8

in. (

10 m

m)

or m

ore

5.9

ft. to

7.5

ft. (

1.8

m to

2.3

m)

Installation plate (1)

Center of ø 3 in. (75 mm) hole

8-11/16 in. (220 mm) or more

4-11/16 in. (120 mm) or more

2-13/16 in. (72 mm) or more5-1/8 in. (130 mm) or more for left/left rear piping (using spacer)

Attachment screw (2)

* Same for left hole.

Level

• Make ground wire a little longer than others. (More than 1-9/16 in. [40 mm])

2-1. ATTACHING THE INSTALLATION PLATE

• To prevent installation plate (1) from vibrating, be sure to install the attachment screws in the holes indicated in the illustration. For added support, additional screws may also be installed in other holes.

When the indoor unit is to be attached to a concrete wall using recessed bolts, secure installation plate (1) using 7/16 in. × 13/16 in. · 7/16 in. × 1 in. (11 mm × 20 mm · 11 mm × 26 mm) oval hole (17-3/4 in. [450 mm] pitch).

Wall

Outdoor side

2-2. DRILLING1) Determine where the holes will be located on the wall.2) Drill a ø 3 in. (75 mm) hole. The outdoor side should be 6/32 to 9/32 in. (5 to 7 mm) lower

than the indoor side.3) Insert wall hole sleeve (C).

2-3. CONNECTING WIRES FOR INDOOR UNITNote:When the indoor unit is powered from the outdoor unit, depending on local code, a discon-nect switch needs to be installed to a power supply circuit.

1) Open the front panel.2) Place the upper part of the indoor unit on the installation plate.3) Remove electrical cover.4) Remove VA clamp.5) Remove corner box.6) Remove cable guide.7) Remove conduit plate.8) Attach conduit pipe (for rear piping) / elbow joint (for right, left, or downward piping) to

conduit plate with lock nut. The thread of the installed conduit pipe / elbow joint appearing inside should be less than 3/8 in. (10 mm). (Fig. 1) Elbow joint should appear less than 1-3/16 in. (30 mm) outside. (Fig. 2)

9) Process the end of ground wire (Fig. 3). Connect it to the ground terminal of electrical parts box.

10) Process the end of indoor/outdoor unit connecting wire (A) (Fig. 3). Attach it to the terminal block. Be careful not to make mis-wiring. Attach the wire to the terminal block securely so that its core cannot be seen, and no external force affects the connecting section of the terminal block.

11) Firmly tighten the terminal screws. After tightening, verify that the wires are tightly fastened.12) Reinstall conduit plate.13) Reinstall cable guide.14) According to the piping direction, remove the shaded part of the left side of box (Fig. 4)

or corner box (Fig. 5).15) Reinstall VA clamp.16) Reinstall electrical cover.17) Reinstall panel assembly.

6/32-9/32 in.(5-7 mm)

ø 3 in.(75 mm)

Lead wire

5/8 in.(15 mm)2-3/16 in.

(55 mm)

Less than 3/8 in. (10 mm)

Conduit plate

Conduit pipe or elbow joint

Lock nut

Elbow joint (for right, left, or downward piping)

Less than 1-3/16 in. (30 mm)

Fig. 1 Fig. 2

Fig. 3 Fig. 4

Corner box

Remove panel for piping on right side of unit

Remove panel for piping on bottom side of unit Fig. 5

BoxRemove panel for piping on bottom left side of unit

Remove panel for piping on left side of unit

4 in. (100 mm)

Remark:* A disconnect switch should be

required. Check the local code.** Use a ring tongue terminal in

order to connect a ground wire to terminal.

Power supply 208/230 V AC, 1phase 2 wires, 60 Hz

INDOOR UNIT

Terminal block

208/230 V AC 1phase, 60 Hz

OUTDOOR UNIT

Term

inal

bl

ock

1

Ground Grounding terminal**

Grounding terminal**

Disconnect switch*

Pull tab to remove cable guide.

• Connect wires to the appropriate terminals

• For future servicing, leave some slack in the connecting wires.

Electrical cover

VA Clamp

Indoor terminal block

Electrical box

Cable guide

Grounding terminal

Conduit pipe

Lock nut

Conduit plate

Elbow joint

Conduit plate

or

2. INDOOR UNIT INSTALLATION

Wall

Ceiling

Wall

Insert the scale. *

Align the scale with the line. *

In the case of left or left rear piping.The position of the Liquid/Gas pipe union is shifted 2-3/16 / 1-9/16 in. (56/40 mm) to the left from the mark.

Term

inal

bl

ock

2

Liquid pipe Gas pipe

Felt tape (7)

Indoor/outdoor unit connecting wire (A)

Piping tape (G)

2-4. PIPE FORMING AND DRAIN PIPING2-4-1. PIPE FORMING• Place the drain hose below the refrigerant piping.• Make sure that the drain hose is not crowded or bent.• Do not pull the hose when applying the tape.

plied).Note:Make sure not to damage the cover of refrigerant pipe when attaching it back on with screws.

Left or left-rear pipingNote:Be sure to reattach the drain hose and the drain cap if the piping is being installed on left or bottom left of unit, otherwise, water could drip down from the drain hose.

the end. Felt tape (7) overlap width should be 1/3 the tape width. Use a bandage stopper at the

end of felt tape (7).2) Pull out the drain cap at the back right of the indoor unit. (Fig. 1)

• Hold the convex section at the end and pull the drain cap.3) Pull out the drain hose at the back left of the indoor unit. (Fig. 2)

• Hold the claw marked by the arrows and pull out the drain hose forward.4) Put the drain cap into the section to which the drain hose is to be attached at the rear of

the indoor unit. (Fig. 3)• Insert a screwdriver into the hole on the cap and insert the cap fully into the drain

pan.5) Insert the drain hose fully into the drain pan at the back right of the indoor unit. (Fig. 4)

• Check if the hose is hooked securely to the projection of its inserting part at the drain pan.

6) Insert the drain hose into wall hole sleeve (C), and attach the upper part of indoor unit onto the installation plate (1). Then, shift the indoor unit completely to the left to make placing the piping in the back of the unit easier.

7) Cut out two pieces of cardboard from the shipping box (use any two pieces of the four pieces), roll each piece, hook them onto the back rib, and use them as spacer to lift the indoor unit. (Fig. 5)

8) Connect the refrigerant piping with the extension pipe (B).9) Attach the lower part of the indoor unit into the installation plate (1).

Drain cap

Drain hose

Drain cap

Drain hose

Fig. 1 Fig. 2

Fig. 3 Fig. 4

Fig. 5

2-4-2. DRAIN PIPING• If the extension drain hose has to pass through a room, be sure to wrap it with insu-

• The drain hose should point downward for easy drain. (Fig. 1)

plied drain hose (I). (Fig. 2)• When connecting the drain hose to a hard vinyl chloride pipe, be sure to insert it

securely into the pipe. (Fig. 3)

Do not make drain piping as shown below.

Do not raise Accumulated drain water

Air

WavingWater leakage

Water leakage

Water leakage

Tip of drain hose dipped in water

Ditch

At least1-31/32 in. (50 mm) gap

Downward slope

Drain hose

Soft hose I.D. 19/32 in. (15 mm)

Drain hoseHard vinyl chloride pipe I.D. 1-3/16 in.(30 mm)

Insert securely

Different diameter joint

27-9/16 in.(70 cm) or more

Fig. 1 Fig. 2 Fig. 3

Rear or bottom piping

from the end.2) Insert the piping and the drain hose into the wall hole sleeve (C), and attach the upper

part of the indoor unit on the installation plate (1).3) Check if the indoor unit is attached securely on the installation plate (1) by moving the unit

to left and right.4) Attach the lower part of the indoor unit into the installation plate (1).

Right pipingNote:Before performing the following, make sure that wiring is completed, and the conduit cover is installed. (Refer to 2-3.)1) Place the refrigerant piping and the drain hose together, shift them to left side of the unit,

2) Insert the piping and the drain hose into the wall hole sleeve (C), and attach the upper part of the indoor unit on the installation plate (1).

3) Check if the indoor unit is attached securely on the installation plate (1) by moving the unit to left and right.

4) Attach the lower part of the indoor unit into the installation plate (1).

Remove panel for piping on left side of unit.Piping tape (G)

Felt tape (7)

Cut off in case of down-ward piping.

3-1. CONNECTING WIRES FOR OUTDOOR UNIT1) Remove the service panel.2) Remove the conduit cover.3) Attach the conduit connector to conduit cover with lock nut then secure it against unit

with screws.4) Connect ground wires of indoor/outdoor unit connecting wire (A) and power supply cord

(K) to the TB support.5) Loosen the terminal screw, and attach indoor/outdoor unit connecting wire (A) from the

indoor unit correctly on the terminal block. Attach the wire to the terminal block securely so that its core cannot be seen, and no external force affects the connecting section of the terminal block.

6) Firmly tighten the terminal screws. After tightening, verify that the wires are tightly fastened.7) Connect power supply cord (K).8) Install the conduit cover.9) Install the service panel securely.

3-2. FLARE CONNECTION1) Cut the copper pipe as straight as possible with a pipe cutter. (Fig. 1, 2)2) Remove all burrs from the cut section of the pipe, ensuring that precautions are taken to

avoid getting metal shavings into the piping. (Fig. 3)

4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension shown in the table. Select A inch (mm) from the table according to the tool you use.

5) Check

3-3. PIPE CONNECTION

• Be sure to wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite.

Indoor unit connectionConnect both liquid and gas piping to indoor unit.

ation oil on screw threads. Excessive tightening torque will result in damage on the screw.

• Use tightening torque table above as a guideline for indoor unit side joints, and tighten

Outdoor unit connectionConnect pipes to stop valve pipe joint of the outdoor unit following the same procedure detailed in Indoor unit connection.• For tightening, use a torque wrench or spanner.

3-4. INSULATION AND TAPING1) Cover piping joints with pipe cover.2) For outdoor unit side, insulate the piping, including valves.3) Apply piping tape (G) starting from the connection on the outdoor unit.

• When piping has to be installed through a ceiling, closet or where the temperature and

Copper pipe

Good

Tilted

No good

Fig. 1 Fig. 2

Burr Copper pipeSpare reamer

Pipe cutter

Fig. 4

Fig. 3

Terminal block

to conduit cover

Power supply cord (K)

Smooth all around

Even length all around

Inside is shin-ing without any scratches.

Fig. 5

Fig. 6

Flare nut

Die

Copper pipe

Clutch type

Flaring tool

Wing nut type

Power supply cord (K)

Indoor/outdoor unit connecting wire (A)

• Make ground wire a little longer than others. (More than 1-3/8 in. [35 mm])

• For future servicing, leave some slack in the connecting wires.

Pipe diameter inch (mm)

B inch(mm)

A inch (mm) Tightening torqueClutch

type tool for R410A

Clutch type tool for R22

Wing nut type tool for R22

ft-lb(kgf•cm) N•m

ø 1/4 (6.35) 21/32 (17)

0 to 0.02(0 to 0.5)

0.04 to 0.06(1.0 to 1.5)

0.06 to 0.08(1.5 to 2.0)

10 to 13(140 to 180) 13.7 to 17.7

ø 3/8 (9.52) 7/8 (22) 25 to 30(350 to 420) 34.3 to 41.2

ø 1/2 (12.7) 1-1/32 (26) 0.08 to 0.10

(2.0 to 2.5)

36 to 42(500 to 575) 49.0 to 56.4

ø 5/8 (15.88) 1-5/32 (29)

54 to 58(750 to 800) 73.5 to 78.4

Lead wire

5/8 in.(15 mm)1-3/8 in.

(35 mm)

Uneven Burred

TB support

When installing the unit, securely connect the refrigerant pipes before starting the compressor.

B

3. OUTDOOR UNIT INSTALLATION

WARNING

Service panel

Lock nut

Conduit cover Conduit plate

Conduit pipe

4-1. PURGING PROCEDURES AND LEAK TEST1) Remove service port caps from stop valves on both sides of refrigerant lines. (The stop

valves are fully closed when shipped.) Leave closed.2) Connect gauge manifold to ports of stop valves.3) Evacuate the system to 4000 microns from both service valves. System manifold gauges

must not be used to measure vacuum. A micron gauge must be used at all times. Break the vacuum with Nitrogen(N2) into the discharge service valve to 0 PSIG.

4) Evacuate the system to 1500 microns. Break the vacuum with Nitrogen(N2) into the discharge service valve to 0 PSIG.

5) Evacuate the system to 500 microns. 6) Close gauge manifold valves, stop the pump, and conduct a 30 minute rise test.7) System should hold 500 microns for a minimum of 1 hour.8) Fully open all stop valves on both sides of gas pipe and liquid pipe. Operating without

fully opening lowers the performance and this causes trouble.9) Refer to 1-3 and charge the prescribed amount of additional refrigerant if needed. Be

sure to charge slowly with liquid refrigerant. Otherwise composition of the refrigerant in the system may be changed and affect performance of the air conditioner.

10) Remove gauge manifolds and replace service port caps and tighten.11) Leak test

Caution:• After test run or remote signal reception check, turn off the unit with the E.O. SW or the

remote controller before turning off the power supply. If this procedure is not performed, the unit will automatically begin operation when power supply is resumed.

To the user• After installing the unit, explain to the user about auto restart function. • If auto restart function is unnecessary, it can be deactivated. Consult the service rep-

resentative to deactivate the function. Refer to the service manual for details.

4-2. TEST RUN1) Insert power supply plug into the power outlet and/or turn

on the breaker. 2) Press the E.O. SW once for COOL, and twice for HEAT

(only MSZ series) operation. Test run will be performed for 30 minutes. If the left lamp of the operation indicator light blinks every 0.5 seconds, inspect the indoor/outdoor unit connecting wire (A) for mis-wiring. After the test run, emergency mode (75°F [24°C]) will start.

3) To stop operation, press the E.O. SW several times until all LED lamps turn off. Refer to operating instructions for details.

Checking the remote (infrared) signal receptionPress the OFF/ON button on the remote controller and listen for an audible indicator from the indoor unit. Press the OFF/ON button again to turn the air conditioner off.• Once the compressor stops, the restart preventive device operates so the compressor

will not operate for 3 minutes to protect the air conditioner.

4-3. AUTO RESTART FUNCTIONThis product is equipped with an auto restart function. When the power supply is cut off during operation, such as during blackouts, the function automatically starts operation in the previous setting once the power supply is resumed. (Refer to the operating instruc-tions for details.)

5-1. REMOVING AND INSTALLING THE PANEL ASSEMBLYRemoval procedure (Fig. 1, 2)1) Remove the three screws that attach the panel assembly.2) Open the front panel.3) Remove the two screws that attach the panel assembly.4) Close the front panel.

Installation procedure (Fig. 3, 4)1) Point the horizontal vane slightly downward. 2) Attach the bottom of the panel assembly under the horizontal vane.3) Fit in the top of the panel assembly.4) Fit in the bottom of the panel assembly and tighten it using screws.5) Push the section of the front panel marked by the arrows to close the front panel securely.

Emergency operation switch(E.O. SW)

Fig. 3 Horizontal vane Fig. 4

Fig. 1 Fig. 2

Stop valve for GAS

Stop valve cap(Torque 15 to 22 ft-lb, 19.6 to 29.4 N•m, 200

Vacuum pump (or the vacuum pump with the function to

Gauge manifold valve (for R410A)

Compound pressure gauge (for R410A)–14.7 psi [Gauge]

(–0.101 Mpa)

Handle Low Handle High

Adapter for preventing the

Charge hose (for R410A)

*Close*Open

Hexagonal wrench

Precautions when using the control valve When attaching the control valve to the service port, valve core may deform or loosen if excess pressure is applied. This may cause gas leak.

Service port

Charge hose Body

CloseOpen

Control valveA

When attaching the control valve to the service port, make sure that the valve core is in closed position, and then tighten part A. Do not tighten part A or turn the body when valve core is in open position.

Service port cap(Torque 10 to 13 ft -Ib, 13.7 to 17.7 N•m, 140 to 180 kgf•cm)

*4 to 5 turns

Stop valve for LIQUID

Pressure gauge(for R410A)

5. RELOCATING THE UNIT / MAINTENANCE

4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN

4-4. EXPLANATION TO THE USER• Using the OPERATING INSTRUCTIONS, explain to the user how to use the air conditioner

from the remote controller holder, cleaning methods, precautions for operation, etc.)• Recommend that the user read the OPERATING INSTRUCTIONS carefully.

5-3. PUMPING DOWNWhen relocating or disposing of the air conditioner, pump down the system following the procedure below so that refrigerant is not released into the atmosphere.1) Connect the gauge manifold valve to the service port of the stop valve on the gas pipe side of the outdoor unit.2) Fully close the stop valve on the liquid pipe side of the outdoor unit.3) Close the stop valve on the gas pipe side of the outdoor unit almost completely so that it can be easily closed fully when the pressure gauge shows 0 psi [Gauge] (0 Mpa).4) Start the emergency COOL operation. To start the emergency operation in COOL mode, disconnect the power supply plug and/or turn off the breaker. After 15 seconds, connect the power supply plug and/or turn on

the breaker, and then press the E.O. SW once. (The emergency COOL operation can be performed continuously for up to 30 minutes.)5) Fully close the stop valve on the gas pipe side of the outdoor unit when the pressure gauge shows (0.1 to 0 psi [Gauge] (0.05 to 0 Mpa)).6) Stop the emergency COOL operation. To stop operation, press the E.O. SW several times until all LED lamps turn off. Refer to operating instructions for details.

5-2. REMOVING THE INDOOR UNITRemove the bottom of the indoor unit from the installation plate. (Fig. 1, 2)• Remove the panel assembly. (Refer to 5-1)

unit and push them up; the bottom of the indoor unit goes down and the hooks are released.*1 Remove the screw.*2 Remove the tab of corner box from the indoor unit, and pull the corner box.*3 Pull the indoor unit to remove.

Square hole

Push Lower

Corner box

Fig. 1 Fig. 2

When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes. The compressor may burst if air etc. get into it.

WARNING

HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

CN105

6. CONNECTING THE INTERFACE/CONNECTOR CABLE TO THE AIR CONDITIONER

Fix the connecting cable at the prescribed position securely. Incorrect installation WARNING

• Connect the INTERFACE/CONNECTOR CABLE to the Indoor electronic control P.C. board of the air conditioner with the connecting cable.• Cutting or extending the connecting cable of the INTERFACE/CONNECTOR CABLE results in defects in connecting. Do not bundle the connecting cable together with power supply cord, indoor/outdoor connecting wire, and/or earth wire. Keep as much distance as possible between the

connecting cable and those wires. • The thin part of the connecting cable should be stored and placed where customers cannot touch it.

Air conditioner

Thin part of the connecting cable. Place this part where customers cannot touch it.

Thick part of the connecting cable

Indoor electronic control P.C. board

CN105 for INTERFACE

Connecting

1 Remove the panel and the lower right corner box.

2 Open the covers of the Indoor electronic control P.C. board.

3 Connect the connecting cable to CN105 on the Indoor electronic control P.C. board.

4 Attach the cable clamp provided with Interface to the thick part of the connecting

5

6 Close the covers of the Indoor electronic control P.C. board. Be careful not to catch the thin part of the connecting cable in the cover. Reinstall the panel and the lower right corner box.